package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.util.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.properties.WeChatProperties;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.service.ShoppingCartService;
import com.sky.task.WebSocketTask;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import io.netty.util.Constant;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.naming.Context;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketTask webSocketTask;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        Long userId = BaseContext.getCurrentId();

        //一、处理各种业务异常(地址簿为空，购物车数据为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null || !addressBook.getUserId().equals(userId)) {
            //抛出业务异常
            throw new RuntimeException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 检查用户的收获地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        //创建购物车对象
        ShoppingCart shoppingCart = new ShoppingCart();

        //设置查询条件，查询当前登录用户的购物车数据
        shoppingCart.setUserId(userId);

        //查询购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        //判断购物车数据是否为空
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            //抛出业务异常
            throw new RuntimeException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //二、向订单表插入1条数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);

        //计算订单总金额(服务端计算总金额，避免前端篡改)
        BigDecimal totalAmount = shoppingCartList.stream()
                .map(ShoppingCart::getAmount)
                .reduce(BigDecimal.ZERO, BigDecimal::add);
        order.setAmount(totalAmount);

        //设置订单生成时间
        order.setOrderTime(LocalDateTime.now());

        //订单支付状态，未支付
        order.setPayStatus(Orders.UN_PAID);

        //订单状态，待付款
        order.setStatus(Orders.PENDING_PAYMENT);

        //订单号，自动生成
        order.setNumber(String.valueOf(System.currentTimeMillis()));

        //设置订单关联的用户手机号(从地址簿中获取)
        order.setPhone(addressBook.getPhone());

        //设置收货人地址
        order.setAddress(addressBook.getDetail());

        //设置订单关联的用户id
        order.setUserId(userId);

        //设置订单关联的用户名称
        order.setConsignee(addressBook.getConsignee());

        //设置用户名称
        order.setUserName(order.getUserName());

        //插入订单数据到订单表
        orderMapper.insert(order);

        //使用List集合存储订单明细
        List<OrderDetail> orderDetailList = new ArrayList<>();

        //三、向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);//将购物车对象中的属性拷贝到订单明细对象中
            orderDetail.setOrderId(order.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);//将订单明细对象添加到集合中
        }

        //批量插入订单明细数据
        orderDetailMapper.insertBatch(orderDetailList);

        //四、清空当前用户的购物车数据
        shoppingCartMapper.deleteShoppingCartById(userId);

        //五、封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderTime(order.getOrderTime())
                .orderAmount(order.getAmount())
                .orderNumber(order.getNumber())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        // 根据订单号查询当前用户的该订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(ordersPaymentDTO.getOrderNumber(), userId);

        paySuccess(ordersDB.getNumber());

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息type orderId content
        Map map = new HashMap();
        map.put("type",1);//1.来单提醒 2.客户催单
        map.put("orderId", orders.getId());
        map.put("content", "订单号："+outTradeNo);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    /**
     * 分页查询历史订单
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQuery(Integer pageNum, Integer pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        //判断page中的数据是否为空
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {

                //获取订单id
                Long orderId = orders.getId();

                //查询订单明细
                List<OrderDetail> orderDetailList = orderDetailMapper.getOrderDetailByOrderId(orderId);

                OrderVO orderVO = new OrderVO();

                //将查询到的订单信息拷贝到orderVO中
                BeanUtils.copyProperties(orders, orderVO);

                //将订单明细设置到orderVO中
                orderVO.setOrderDetailList(orderDetailList);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 订单明细
     * @param id
     * @return
     */
    public OrderVO getOrderDetail(Long id) {

        //根据id查询订单
        Orders order = orderMapper.getById(id);

        //查询和订单对应的菜品/套餐的明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getOrderDetailByOrderId(order.getId());

        //将订单及其菜品/套餐封装到OrderVO中
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(order, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    public void cancel(Long id) throws Exception {
        //先根据id查询订单
        Orders order = orderMapper.getById(id);

        //校验订单是否存在
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态：1待付款、2待接单、3已接单、4派送中、5已完成、6已取消
        if (order.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setUserId(order.getUserId());

        // 处理待接单状态下的退款
        if (order.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            if (!Orders.PAID.equals(order.getPayStatus())) {
                throw new OrderBusinessException("订单未支付，无需退款");
            }
            try {
//                weChatPayUtil.refund(
//                        order.getNumber(),
//                        generateRefundNo(order.getNumber()),
//                        order.getAmount(),
//                        order.getAmount()
//                );
                System.out.println("模拟退款成功");
            } catch (Exception e) {
                throw new OrderBusinessException("退款失败: " + e.getMessage());
            }
        }

        // 更新订单状态
        Orders updateOrder = new Orders();
        updateOrder.setId(order.getId());
        updateOrder.setStatus(Orders.CANCELLED);
        updateOrder.setCancelReason("用户取消");
        updateOrder.setCancelTime(LocalDateTime.now());
        if (order.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            updateOrder.setPayStatus(Orders.REFUND);
        }
        orderMapper.update(updateOrder);
    }

    /**
     * 取消订单（商家端）
     * @param ordersCancelDTO
     * @throws Exception
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.CANCELLED)
                .cancelReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    public void repetition(Long id) {
        //查询当前用户Id
        Long userId = BaseContext.getCurrentId();

        //根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getOrderDetailByOrderId(id);

        //将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            //将当前购物车对象中的菜品信息重新拷贝到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        //将购物车对象批量插入到购物车数据
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 条件搜索订单(商家端)
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转为OrderVo
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以接单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            // 退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            System.out.println("模拟退款成功");
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 派送订单(商家端)
     * @param id
     */
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 完成订单(商家端)
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 完成订单，修改订单状态为完成
        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 催单
     * @param id
     */
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map = new HashMap();
        map.put("type", 2); // 1表示来单提醒，2表示客户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + ordersDB.getNumber());

        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 将订单信息封装到OrderVO中
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getOrderDetailByOrderId(orders.getId());

        // 将每条订单菜品信息拼接成字符串
        List<String> orderDishList = orderDetailList.stream().map(o -> {
            String orderDish = o.getName() + "*" + o.getNumber() + "份";
            return orderDish;
        }).collect(Collectors.toList());

        // 将订单对应的所有菜品信息拼接到一起
        return String.join("，", orderDishList);
    }

    /**
     * 根据订单号生成退款单号
     *
     * 通过拼接订单号、"_REFUND_"字符串和当前时间的毫秒值来生成唯一的退款单号
     * 这种方式确保了退款单号的唯一性和时间顺序性，便于跟踪和管理退款请求
     *
     * @param orderNumber 订单号，用于生成退款单号的基础
     * @return 生成的退款单号
     */
    private String generateRefundNo(String orderNumber) {
        return orderNumber + "_REFUND_" + System.currentTimeMillis();
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address", shopAddress);
        map.put("output", "json");
        map.put("ak", ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address", address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin", shopLngLat);
        map.put("destination", userLngLat);
        map.put("steps_info", "0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if (distance > 10000) {
            //配送距离超过10000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

}
